What is Interlock Sequencing designed to do?

What is Interlock Sequencing designed to do?

• A. Keep one output from turning on before another output has turned on
• B. Allow outputs to energize simultaneously
• C. Disable all sequencing
• D. Reset outputs in order

Answer: (A)

Interlock sequencing is about ensuring a safe and controlled order of operations by preventing one output from energizing until another has already turned on. This keeps devices from activating out of sequence, which can avoid conflicts or hazards in a system. In practice, an interlock requires the first device or condition to be satisfied before the second can energize, enforcing a defined startup or operating order. That’s why the best choice expresses that one output is kept from turning on before the other has turned on. The other options describe capabilities that don’t match the purpose of interlocks: allowing simultaneous energizing defeats the purpose of the interlock, disabling sequencing isn’t what interlocks do, and resetting outputs in order describes a different kind of control action.

Interlock sequencing is about ensuring a safe and controlled order of operations by preventing one output from energizing until another has already turned on. This keeps devices from activating out of sequence, which can avoid conflicts or hazards in a system. In practice, an interlock requires the first device or condition to be satisfied before the second can energize, enforcing a defined startup or operating order.

That’s why the best choice expresses that one output is kept from turning on before the other has turned on. The other options describe capabilities that don’t match the purpose of interlocks: allowing simultaneous energizing defeats the purpose of the interlock, disabling sequencing isn’t what interlocks do, and resetting outputs in order describes a different kind of control action.